linux-kernel - [RFC][Patch 3/4] jprobe fast unregisteration

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Date:	Fri, 23 Mar 2007 23:46:51 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	"Keshavamurthy, Anil S" <anil.s.keshavamurthy@...el.com>,
	Prasanna S Panchamukhi <prasanna@...ibm.com>
Cc:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	SystemTAP <systemtap@...rces.redhat.com>,
	Satoshi Oshima <soshima@...hat.com>,
	Hideo Aoki <haoki@...hat.com>,
	Yumiko Sugita <yumiko.sugita.yf@...achi.com>,
	"Frank Ch. Eigler" <fche@...hat.com>
Subject: [RFC][Patch 3/4] jprobe fast unregisteration


This patch introduces unregister_jprobe_fast() for jprobe.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>

---
 This patch introduces unregister_jprobe_fast() for jprobe.

 include/linux/kprobes.h |   12 +++++++++++-
 kernel/kprobes.c        |    6 ------
 2 files changed, 11 insertions(+), 7 deletions(-)

Index: linux-2.6.21-rc4-mm1/include/linux/kprobes.h
===================================================================
--- linux-2.6.21-rc4-mm1.orig/include/linux/kprobes.h
+++ linux-2.6.21-rc4-mm1/include/linux/kprobes.h
@@ -198,7 +198,14 @@ void commit_kprobes(void);
 int setjmp_pre_handler(struct kprobe *, struct pt_regs *);
 int longjmp_break_handler(struct kprobe *, struct pt_regs *);
 int register_jprobe(struct jprobe *p);
-void unregister_jprobe(struct jprobe *p);
+static inline void unregister_jprobe(struct jprobe *jp)
+{
+	unregister_kprobe(&jp->kp);
+}
+static inline void unregister_jprobe_fast(struct jprobe *jp)
+{
+	unregister_kprobe_fast(&jp->kp);
+}
 void jprobe_return(void);

 int register_kretprobe(struct kretprobe *rp);
@@ -242,6 +249,9 @@ static inline int register_jprobe(struct
 static inline void unregister_jprobe(struct jprobe *p)
 {
 }
+static inline void unregister_jprobe_fast(struct jprobe *p)
+{
+}
 static inline void jprobe_return(void)
 {
 }
Index: linux-2.6.21-rc4-mm1/kernel/kprobes.c
===================================================================
--- linux-2.6.21-rc4-mm1.orig/kernel/kprobes.c
+++ linux-2.6.21-rc4-mm1/kernel/kprobes.c
@@ -797,11 +797,6 @@ int __kprobes register_jprobe(struct jpr
 		(unsigned long)__builtin_return_address(0));
 }

-void __kprobes unregister_jprobe(struct jprobe *jp)
-{
-	unregister_kprobe(&jp->kp);
-}
-
 #ifdef ARCH_SUPPORTS_KRETPROBES

 /*
@@ -1013,6 +1008,5 @@ EXPORT_SYMBOL_GPL(unregister_kprobe);
 EXPORT_SYMBOL_GPL(unregister_kprobe_fast);
 EXPORT_SYMBOL_GPL(commit_kprobes);
 EXPORT_SYMBOL_GPL(register_jprobe);
-EXPORT_SYMBOL_GPL(unregister_jprobe);
 EXPORT_SYMBOL_GPL(jprobe_return);
 EXPORT_SYMBOL_GPL(register_kretprobe);

-
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